Outsidepride Blue Flax Linum Perenne Flower Seed - 5000 Seeds Blue Flax wildflower grows as a perennial in USDA Zones: 3 - 10 and prefers full sun but will tolerant partial shade. Linum Perenne will reach 12 - 24 inches in height and has blue blooms in the spring and summer. This wild flower is deer resistant and both cold and drought tolerant. Sow these heirloom seeds at 3 ounces per 1,000 square feet or 9 pounds per acre in well-drained soil and keep moist until germination occurs. Our seeds are always Non-GMO and packaged for the current year.